Idle-State MIMO Antenna Mode Selection for Faster Call Setup
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Solution Overview
Problem
Current mobile telecommunication networks cannot effectively select the best Multiple Input Multiple Output (MIMO) mode for user equipment (UE) during idle or low activity states, leading to potential throughput loss and connection issues when transitioning from idle to active states.
Innovation Solution
A method and arrangement that determine a mode list of supported antenna modes, associate each mode with performance measures, and select an appropriate mode based on retrieved information, enabling MIMO mode selection even in idle states to ensure optimal performance and reduce call setup delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If MIMO mode switching is only performed during active connection, then device complexity is reduced, but throughput loss occurs during idle to active state transitions
Solution Approach 1:
The patent applies preliminary action by determining and maintaining a mode list of supported antenna modes during idle state, before actual data transmission begins. The network determines which antenna modes both the UE and network support, and maintains this information ready for quick activation when transitioning to active state, avoiding the need to perform mode selection from scratch during connection establishment.
2Use of energy by moving object
If UE enters discontinuous reception mode to save power, then energy consumption is reduced, but MIMO mode selection information is not updated
Solution Approach 1:
The patent extracts the MIMO mode determination and maintenance functions from the active connection state and implements them independently during idle state. The network performs mode determination separately while UE is in discontinuous reception, maintaining the mode list information without requiring UE to be in full active state, thus preserving power savings while preventing information loss.
3Speed
If cell reselection is performed autonomously by UE, then response time is reduced, but network cannot optimize MIMO mode selection
Solution Approach 1:
The patent implements feedback by having the UE report its capability information and measurement results to the network during idle state. The network uses this feedback to determine the appropriate mode list of supported antenna modes, combining UE autonomous cell reselection speed with network-optimized MIMO mode selection based on actual channel conditions and UE capabilities.
4Adaptability or versatility
If multiple antenna modes are supported, then system adaptability is improved, but mode selection complexity increases
Solution Approach 1:
The patent resolves the complexity issue by performing mode determination in advance during idle state and maintaining a pre-determined mode list. When transitioning to active state, the UE simply activates one of the pre-identified supported modes from the maintained list, avoiding real-time complex evaluation of multiple modes and reducing selection complexity while maintaining adaptability.
Data Source
AI summary
The present invention relates to a method and an arrangement for a mobile telecommunication network for selecting an antenna mode to be used for communication between a radio network and a mobile terminal operating in discontinuous reception mode. The arrangement comprises a determiner configured to determine a mode list comprising antenna modes both supported by the radio network and the mobile terminal, associating means configured to associate each antenna mode in the mode list with a degree of a pre-defined performance measure, retrieving means configured to retrieve information indicating the pre-defined performance measure for the mobile terminal, and a selector configured to select an antenna mode from the mode list at least based on the retrieved information.